code: def testSliceSpecBeamCounter(self):
      with beam.Pipeline() as pipeline:
          _ = (
              pipeline
              | beam.Create([((("slice_key", "first_slice"),), 2)])
              | counter_util.IncrementSliceSpecCounters()
          )
  
      result = pipeline.run()
  
      slice_spec_filter = (
          beam.metrics.metric.MetricsFilter()
          .with_namespace(constants.METRICS_NAMESPACE)
          .with_name("slice_computed_slice_key_first_slice")
      )
      slice_count = (
          result.metrics()
          .query(filter=slice_spec_filter)["counters"][0]
          .committed
      )
      self.assertEqual(slice_count, 1)
  
file_path: model-analysis/tensorflow_model_analysis/evaluators/counter_util_test.py
imports: import apache_beam
  import tensorflow
  from tensorflow_model_analysis import constants
  from tensorflow_model_analysis.evaluators import counter_util
  from tensorflow_model_analysis.post_export_metrics import post_export_metrics
  from tensorflow_model_analysis.proto import config_pb2
label_desc: Use image node_id 2 for calling the CounterUtilTest obj's underlying member method code with example usage: obj.testSliceSpecBeamCounter() without return types